Abstract
A TiO 2 microporous electrode is modified simultaneously with porphyrin dye molecules and phthalocyanine dye molecules by chemical adsorption. Since porphyrin and phthalocyanine dye have a different spectral region for absorption of visible light, the TiO 2 electrode modified with these two dyes could more effectively absorb visible light. Experimental results show that the sensitization of TiO 2 electrode with porphyrin and phthalocyanine dyes effectively extends the optical absorption spectrum and photocurrent spectrum into a wider visible range and exhibits a significant improvement of photoresponse compared to the of a single dye modified electrode.
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